#include<iostream>
#include<string>
#include<vector>
#include<algorithm>
#include<cmath>
using namespace std;
inline void keep_window_open() {char ch; cin >> ch; }
int main()
{
cout <<"Please, add your name (ens press 'enter'):\n";
string first_name;
cin >> first_name;
cout << "Hello, " << first_name << "!\n";
}
